Computed tomography Virtual laryngoscopy: comparison between radiological and otolaryngological evaluations for laryngeal carcinoma

Year 2006, Volume: 16 Issue: 3, 97 - 104, 30.06.2006

Yezdan Fırat Erdinç Aygenç Ahmet Kemal Fırat Aytekin Oto Adin Selçuk Mehmet Murat Fırat Cafer Özdem

Abstract

Objectives: We evaluated the utility of computed tomography Virtual laryngoscopy CTVL in identifying endolaryngeal lesions in laryngeal tumors.Patients and Methods: Virtual laryngoscopic images were obtained from axial CT seans of 21 patients with known laryngeal carcinoma. Findings from rigid telescopic videolaryngoscopy RTV and CTVL images were evaluated and compared with reference to operative records.Results: Lesions localized in the base of the tongue, pyriform sinüs, aryepiglottic folds, and arytenoids were well visualized by both RTV and CTVL. The two techniques were not found effective in identifying lesions of the ventricular bands, ventricular cavities, and the anterior commissure. Virtual laryngoscopy was superior to RTV in the visualization of the sub- glottic area and vocal cords.Conclusion: Virtual laryngoscopy is a noninvasive and reliable technique that provides visualization of endolaryngeal surfaces and tumor extension. İt may be beneficial in staging larynx carcinoma and plan- ning the most appropriate surgical procedure.

Keywords

Image Processing, computer-assisted, laryngeal diseases/radiography, laryngoscopy, larynx/pathology/radiography, tomography, x-ray computed/methods

Bilgisayarlı tomografi sanal larengoskopi: Larenks kanserinde otolarengolojik muayene ile radyolojik değerlendirmenin karşılaştırılması

Abstract

Amaç: Larengeal tümörlü hastalarda, endolarengeal lezyon tayininde bilgisayarlı tomografi BT sanallarengoskopinin etkinliği araştırıldı.Hastalar ve Yöntemler: Larengeal kanserli 21 hastada kontrastlı aksiyel BT kesitlerinden sanal larengoskopi görüntüleri elde edildi. Hastaların rijit teleskopik videolarengoskopik muayene bulguları ve sanal larengoskopi bulguları ameliyat kayıtlarıyla karşılaştırıldı.Bulgular: Dil kökü, priform sinüs, ariepiglottik bantve aritenoid seviyelerindeki lezyonlar her iki yöntemle de güvenilir bir şekilde gösterilebildi. Ventriküler bant, ventriküler kavite ve anterior komissürseviyelerindeki lezyonlar için her iki yöntem de güvenilir değildi. Subglottik bölge ve vokal kordlardasanal larengoskopinin lezyon tayini daha güvenilirbulundu.Sonuç: Sanal larengoskopi endolarengeal yüzeylerin görüntülenmesinde ve tümör yayılımının saptanmasında invaziv olmayan ve güvenilir bir yöntemdir.Larenks kanserli hastalarda cerrahi öncesi evrelemeve uygun cerrahi tekniğin seçiminde yararlı olabilir

Keywords

Görüntü işleme, bilgisayar destekli, larengeal hastalıklar/radyografi, larengoskopi, larenks/patoloji/radyografi, bilgisayarlı tomografi/yöntem

References

• Williams DW 3rd. Imaging of laryngeal cancer. Otolaryngol Clin North Am 1997;30:35-58.
• Berry DA, Montequin DW, Tayama N. High-speed digital imaging of the medial surface of the vocal folds. J Acoust Soc Am 2001;110(5 Pt 1):2539-47.
• Yumoto E, Sanuki T, Hyodo M, Yasuhara Y, Ochi T. Three-dimensional endoscopic mode for observation of laryngeal structures by helical computed tomogra- phy. Laryngoscope 1997;107(11 Pt 1):1530-7.
• Gilani S, Norbash AM, Ringl H, Rubin GD, Napel S, Terris DJ. Virtual endoscopy of the paranasal sinuses using perspective volume rendered helical sinus com- puted tomography. Laryngoscope 1997;107:25-9.
• Auer LM, Auer DP. Virtual endoscopy for planning and simulation of minimally invasive neurosurgery. Neurosurgery 1998;43:529-37.
• Fried MP, Moharir VM, Shinmoto H, Alyassin AM, Lorensen WE, Hsu L, et al. Virtual laryngoscopy. Ann Otol Rhinol Laryngol 1999;108:221-6.
• Gallivan RP, Nguyen TH, Armstrong WB. Head and neck computed tomography virtual endoscopy: evalu- ation of a new imaging technique. Laryngoscope 1999; 109:1570-9.
• Zinreich SJ, Mattox DE, Kennedy DW, Johns ME, Price JC, Holliday MJ, et al. 3-D CT for cranial facial and laryngeal surgery. Laryngoscope 1988;98:1212-9.
• Meglin AJ, Biedlingmaier JF, Mirvis SE. Three-dimen- sional computerized tomography in the evaluation of laryngeal injury. Laryngoscope 1991;101:202-7.
• Silverman PM, Zeiberg AS, Sessions RB, Troost TR, Zeman RK. Three-dimensional imaging of the hypopharynx and larynx by means of helical (spiral) computed tomography. Comparison of radiological and otolaryngological evaluation. Ann Otol Rhinol Laryngol 1995;104:425-31.
• Walshe P, Hamilton S, McShane D, McConn Walsh R, Walsh MA, Timon C. The potential of virtual laryn- goscopy in the assessment of vocal cord lesions. Clin Otolaryngol Allied Sci 2002;27:98-100.
• Wang D, Zhang W, Xiong M, Xu J. Laryngeal and hypopharyngeal carcinoma: comparison of helical CT multiplanar reformation, three-dimensional recon- struction and virtual laryngoscopy. Chin Med J (Engl) 2001;114:54-8.
• Rodenwaldt J, Kopka L, Roedel R, Margas A, Grabbe E. 3D virtual endoscopy of the upper airway: optimization of the scan parameters in a cadaver phantom and clini- cal assessment. J Comput Assist Tomogr 1997;21:405-11.
• Dunham ME, Wolf RN. Visualizing the pediatric air- way: three-dimensional modeling of endoscopic images. Ann Otol Rhinol Laryngol 1996;105:12-7.
• El Fiky LM, AbdelMoneim HE, El Fiky SM, Eissa IM. Evaluation of upper airway lesions by virtual endoscopy. International Congres Series 2003;1240:1455-9.